I missed last nights episode of CSI could someone give me a summary of what happened?

The cases involved the death of two women. One was shot outside a dry cleaners and the other was found hanging in the home. When they were put side by side in the morgue the coroner and one of the agents found out they were identical twins. They found a letter in the purse of the one that had been shot that was addressed to a woman named Cora. The letter also had a couple of fingerprints on it. Cora turned out to be the twins mother and she gave up the twins for adoption. They then found out she had another daughter who ended up being the one who sent the letter and was found to be lurking outside her house in her car. They then discovered that the hanging was done after the second twin was already dead so instead of a murder/suicide both twins were murdered. It turns out that both twins were killed by the same man. The second twin would normally bring her clothes to be dry cleaned in the evening only her sister did it that day and he mistook one for the other. So when he got back to her home he found out she was somehow still alive and killed her also.

Oh man, some of Mr Nerd's co workers and bosses all got together at the bar last night, to unwind after a terrible stressful week. And after everyone got a few drinks down them and started talking about this weeks episodes of the TV shows we watch, the Bosses wife started doing the most Hi-larious impression of "Horatio" Ug, then we all went of on this tangent about how TERRIBLE he has gotten. I mean, he used to be bad.. But it's gotten just baaaaad.